Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7410721 | Positive electrode current collector and manganese dry battery using the same | Keiji Ogino, Hajime Murakami | 2008-08-12 |
| 7169507 | Manganese dry battery | Ryohei Ashihara, Keiji Ogino, Isao Kubo | 2007-01-30 |